import { addResizeListener, removeResizeListener } from 'element-ui/src/utils/resize-event'

/**
 * How to use
 * <el-table height="100px" v-el-height-adaptive-table="{bottomOffset: 30}">...</el-table>
 * el-table height is must be set
 * bottomOffset: 30(default)   // The height of the table from the bottom of the page.
 */

const doResize = ( el, binding, vnode ) => {
  const { componentInstance : $table } = vnode

  const { value } = binding

  if ( !$table.height ) {
    throw new Error( `el-$table must set the height. Such as height='100px'` )
  }
  const bottomOffset = ( value && value.bottomOffset ) || 30

  if ( !$table ) return

  const height = window.innerHeight - el.getBoundingClientRect().top - bottomOffset
  $table.layout.setHeight( height )
  $table.doLayout()
}

export default {
  bind( el, binding, vnode ) {
    el.resizeListener = () => {
      doResize( el, binding, vnode )
    }
    // parameter 1 is must be "Element" type
    addResizeListener( window.document.body, el.resizeListener )
  },
  inserted( el, binding, vnode ) {
    doResize( el, binding, vnode )
  },
  unbind( el ) {
    removeResizeListener( window.document.body, el.resizeListener )
  }
}
